The bulk of our ordinary activities must be co-operative, and co-operation must have an instinctive basis. Nevertheless, we should all learn to be able to think for ourselves about matters that are particularly well known to us, and we ought all to have acquired the courage to proclaim unpopular opinions when we believe them to be important.
Source: On Education, especially in early childhood, 1926, chap. 2 The Aims of Education
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